home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
SGI Hot Mix 17
/
Hot Mix 17.iso
/
HM17_SGI
/
research
/
examples
/
demo
/
demotext
/
heart.txt
< prev
next >
Wrap
Text File
|
1997-07-08
|
3KB
|
112 lines
WELCOME to The BEATING HEART DEMO
Data Courtesy of:
Dr. Stephan Nekolla
Leiter Medizinische Datenverarbeitung
Klinik und Poliklinik fuer Nuklearmedizin
Klinikum rechts der Isar der Technischen
Universitaet Muenchen
Ismaningerstr. 22 D-81675 Muenchen
Generating the Heart:
---------------------
The heart geometry is generated from triangulating
an array of points into a series of quad polygons.
Each frame of the beating heart consists of 3
parts: Inner Surface, Outer Surface, and Bottom
(connecting) surface.
The colors are determined using a color lookup
value from a 3D array of perfusion values stored
for every point. The heart is then animated
with the 16 frames generated from the above steps.
IDL 5.0 Features:
-----------------
This demo uses the following features from the new
IDL 5.0 Object Graphics:
o Interactive 3D graphics to control the object
transformation (rotation) with the mouse.
o Geometry creation using "IDLgrPolygon" and
"IDLgrPolyline" to represent the heart light
source icons.
o Light source shading, using 2 "Positional"
light sources.
MENU OPTIONS
------------
File Menu:
Select "Quit" to exit the Beating Heart Demo and
return to the IDL Demo main screen.
Options Menu:
Shading
Select either Flat or Gouraud shading for the
solid. Gouraud shading results in a more realistic
appearance. Shading is only enabled when the
Style is set to Solid.
Style
Select either Wire or Solid to represent the
surface of the heart.
Drag Quality
Select either Low or High quality for when you
rotate the solid by dragging the mouse. Low
quality shows a wire surface when dragging while
High quality retains the surface displayed.
Help Menu:
Select "About Beating Heart" for information about
the Beating Heart Demo.
FEATURES
--------
<<OBJECT VISIBILITY>> checklist
Select one or all of the following choices for
displaying the heart. A check next to the item
specifies that it is enabled.
o Outer surface
o Inner surface
o Bottom surface
o Axis 3D
o Light icons
o Annotations
<<APPLY CPR>> button
Starts the animation sequence.
<<SKIP A BEAT>> button
Displays each animation frame in order.
<<RESET>> button
Reset the heart to its initial orientation.
INTERACTIVE MOVEMENT
Use your left mouse button to interactively
rotate the heart. Position the cursor on the
image and, while holding down the left mouse
button, move the cursor to rotate the heart.
Release the mouse button when you are satisfied
with the position of the heart.